9 And thou shalt take the anointing oil, and anoint the tabernacle, and all that is therein, and shalt hallow it, and all the vessels thereof: and it shall be holy.

10 And thou shalt anoint the altar of the burnt offering, and all his vessels, and sanctify the altar: and it shall be an altar most holy.

11 And thou shalt anoint the laver and his foot, and sanctify it.

All the different elements of the tabernacle were in place, but before they could be used, they had to be anointed with oil. Every part of it, inside and out, was to be anointed, which is said to be for the sake of “sanctifying” them.

To sanctify something has a dual meaning. It is used both to mean the cleansing and purifying of something, as well as to choose and set apart something for a holy purpose. Presumably both of those meanings are meant here. Every time the tabernacle was set up, they would be anointed to cleanse them of the world’s detritus, and to consecrate them once again to the service of the Lord.